Article
Nanoscience & Nanotechnology
Nicholas Langer, Mason LeGrand, Ofer Kedem
Summary: It has been found that cationic polyelectrolyte coatings can increase the catalytic activity of partially embedded gold nanoislands towards transfer hydrogenation and oxidation reactions with anionic substrates compared to uncoated ones. The potential steric hindrance caused by the coating is countered by a decrease in the activation energy of the reaction by half, resulting in overall enhancement. Direct comparison to uncoated nanoparticles isolates the role of the coating and provides conclusive evidence of enhancement.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Applied
Kam Sheng Lau, Siew Xian Chin, Poi Sim Khiew, Sarani Zakaria, Michelle Lee Jia Yin, Kelly Hong Mun Key, Chin Hua Chia
Summary: In this study, polyethylenimine (PEI)-incorporated chitosan beads were efficiently produced using a fast and simple dissolution and coagulation method. The PEI content of 30% enhanced the adsorption capacity of the beads by about two-fold, reaching a maximum of 183.15 mg/g. Furthermore, the PEI-incorporated beads exhibited excellent regeneration ability and can be reused multiple times.
JOURNAL OF POROUS MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Afsaneh Zarei, Farzaneh Alihosseini, Dambarudhar Parida, Rashid Nazir, Sabyasachi Gaan
Summary: A novel conductive nanohydrogel hybrid support was prepared and utilized for immobilizing cellulase enzyme with high thermal stability and reusability. The hybrid support exhibited a mesoporous, rod-like structure with a slit-like pore geometry, and the immobilized enzyme retained high activity after multiple reuse cycles. Parameters were optimized to achieve high immobilization efficiency and the potential for protein immobilization was demonstrated.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Zhangyuan Cheng, Jiabo Le, Jun Wang, Wenlu Sun, Lei Zheng, Lifeng Cai, Derong Lu, Yanbin Shen, Jihuai Wu, Fang Fu, Hongwei Chen
Summary: The study introduces an organic framework capable of efficiently co-storing anions and cations in a single discharge/charge process, delivering high capacity and energy density. The unique cation-assisted electrode activation process and the understanding of self-activation is expected to inspire new electrode designs beyond current Li-ion batteries.
ADVANCED ENERGY MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Zhiqi Zhao, Hongbing Zhou, Xu Han, Lun Han, Zhenzhen Xu, Peng Wang
Summary: Poly(allylamine hydrochloride)/poly(styrene sulfonic acid) sodium salt microcapsules (P2P MCs) and poly(allylamine hydrochloride)/poly(styrene sulfonic acid) microcapsules (P2 MCs) were prepared using a layer-by-layer method. The P2 MCs exhibited high adsorption capacity for Rhodamine B and methylene blue, while the P2P MCs showed high adsorption capacities for reactive orange K-G and direct yellow 5G. The adsorption processes of all dyes followed the Langmuir isotherm model and the pseudo-second-order kinetic model. Moreover, the P2P MCs loaded with reactive dyes could further adsorb rhodamine B, and the P2 MCs adsorbed with cationic MB dyes could be used for secondary adsorption treatment of direct dye waste-water.
Article
Chemistry, Applied
Yurong Li, Shaocong Wang, Zhen Xing, Yiming Niu, Zhencheng Liao, Yang Lu, Junni Qiu, Junfeng Zhang, Chunming Wang, Lei Dong
Summary: Eliminating biofilms from infected tissue is a challenging task in treating chronic wounds. The study found that cationic polymers can disrupt biofilms and enhance bacterial antibiotic sensitivity. In a mouse wound healing model, cationic polymers effectively controlled infection and accelerated the healing process.
CARBOHYDRATE POLYMERS
(2022)
Article
Polymer Science
Rui Chen, Hao He, Xian Zheng Hong, Qiujian Le, Kuan Sun, Jianyong Ouyang
Summary: This study investigates the plasticization effect of cationic and anionic surfactants on stretchable conductors. The results show that cationic surfactants can increase the elongation at break of PEDOT:PSS, while anionic surfactants enhance the conductivity. Additionally, these surfactants greatly improve the wettability of PEDOT:PSS solution on a hydrophobic substrate.
Article
Chemistry, Physical
Gulnara A. Ahmadova, Ravan A. Rahimov, Z. Abilova, Khuraman A. Huseynova, Elmar Imanov, Fedor I. Zubkov
Summary: This study investigated the interaction between cationic surfactants and anionic polyelectrolytes in aqueous media, evaluating various parameters such as surface tension, surface pressure, and adsorption efficiency. Thermodynamic parameters were calculated, and the influence of the nature of the head-groups on the colloidal properties of the complexes was compared. Additionally, the ability of these complexes to collect oil in waters of different mineralization degrees was examined.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Multidisciplinary
Sergey O. Solomevich, Aleksandra Cherkasova, Daria A. Salamevich, Uladzislau E. Aharodnikau, Pavel M. Bychkovsky, Tatiana L. Yurkshtovich
Summary: In this study, calcium/dextran phosphate beads (Ca-DP) and chitosan/dextran phosphate capsules (CS-DP) were synthesized as potential drug delivery systems through ionic gelation method and formation of polyelectrolyte complexes. The experiments showed that they had low cytotoxicity and prolonged release effect on prospidine.
Article
Polymer Science
Xin Wang, Xuhong Guo, Martien Cohen A. Stuart, Junyou Wang, Peng Ding
Summary: In this study, cationic polyelectrolyte nanogels were successfully synthesized by Electrostatic Assembly Directed Polymerization (EADP) method and used to load gold nanoparticles (AuNPs). The catalytic activity of the loaded AuNPs was found to be dependent on the crosslinking degree of the nanogels, but independent on the nanogel size. This demonstrates the potential of polyelectrolyte nanogels for developing functional nanoreactors.
Article
Chemistry, Multidisciplinary
Alex Burnstine-Townley, Somen Mondal, Yuval Agam, Ramesh Nandi, Nadav Amdursky
Summary: This study demonstrates light-modulation of the chemical nature and ionic charge carrier concentration within protein-based biopolymers functionalized with photoacids or photobases. Electrical measurements showed an impressive light-modulated increase in ionic conductivity for both types of functionalized biopolymers. Protons are suggested as the charge carriers for the photoacid-functionalized biopolymer, while water-derived anionic hydroxides are suggested as the charge carriers for the photobase-functionalized biopolymer.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Biochemical Research Methods
Mahiro Shimizu, Shunichi Aikawa, Yasumasa Fukushima
Summary: A novel colorimetric probe for Mn2+ was prepared by mixing negatively charged alizarin complexone (ALC) with positively charged poly[bis(2-chloroethyl)ether-alt-1,3-bis[3-(dimethylamino)propyl]urea] (PQ-2) in aqueous solutions at pH 6.0. The mixture showed selective detection of Mn2+ over other metal ions by a naked-eye color change from red to purple. This sensing strategy offers advantages such as no organic synthesis, facile fabrication, and simple visual detection.
JOURNAL OF FLUORESCENCE
(2023)
Article
Chemistry, Physical
Sergio E. Dominguez, Benjamin Kohn, Timo Aaritalo, Pia Damlin, Ulrich Scheler, Carita Kvarnstrom
Summary: This study systematically investigated the H-bonding interactions of CPTs with different fluorescence quenching behaviors in water or W-DI solvent, potentially influenced by the displacements or rotations of the H-bonds.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Muhammad A. Abbas, Geun Jun Lee, Jin Ho Bang
Summary: Nickel-cadmium and nickel-metal hydride batteries, as well as lithium-ion intercalation materials, exhibit voltage deviations known as the memory effect. The extent of the memory effect in TiO2 is influenced by particle size, Li-ion mobility, and the type of vacancies.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jovana Jevric, Simon M. Langenegger, Robert Haener
Summary: This study describes the chemical synthesis and supramolecular assembly of an aromatic oligoamine, which leads to the formation of vesicular objects in aqueous solution. The assembly process is monitored by absorption and fluorescence spectroscopy, and the vesicles are characterized by atomic force and transmission electron microscopy. The electrostatic complementarity of anionic supramolecular polymer sheets and cationic vesicles is utilized for a layered assembly process.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Anna Grobelny, Zhongjin Shen, Felix T. Eickemeyer, Naura F. Antariksa, Szczepan Zapotoczny, Shaik M. Zakeeruddin, Michael Graetzel
Summary: This study presents two molecularly tailored organic sensitizers, ZS4 and ZS5, for highly efficient dye-sensitized solar cells (DSCs). ZS4 shows superior electron injection and charge collection efficiency compared to ZS5, resulting in a high power conversion efficiency of 13.2% under sunlight and outstanding stability with 95% of initial efficiency retained after 1000 hours of continuous light soaking.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Wieslaw J. Roth, Takayoshi Sasaki, Karol Wolski, Barbara Gil, Szczepan Zapotoczny, Jiri Cejka, Martin Kubu, Michal Mazur, Yasuo Ebina, Nobuyuki Sakai, Dai-Ming Tang, Renzhi Ma
Summary: This article introduces a soft-chemical treatment method that can exfoliate layered zeolite MFI into nanosheets, which can be used for the synthesis of layer-based hierarchical and nanocomposite materials. The obtained nanosheets have uniform hydrated thickness and can be reassembled into self-standing discs or films, preserving high acid site concentration and porosity. The oriented MFI films formed by this method can be applied in catalysis and separations.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Analytical
Mansoor Khan, Rasim Alosmanov, Karol Wolski, Szczepan Zapotoczny, Mustafa Soylak
Summary: This study reported the synthesis of a magnetic phosphorus-containing adsorbent decorated with poly(N-isopropylacrylamide) (PNIPAM) brushes via surface-initiated atom transfer radical polymerization (SI-ATRP) and its application for vortex assisted solid phase extraction of lead in water, cigarettes and soil. The adsorbent was characterized using Fourier-transform infrared spectroscopy (FT-IR) and energy dispersive x-ray (EDX) spectroscopy. The method was shown to be sensitive, efficient and reproducible, with satisfactory recoveries achieved using certified reference materials.
ANALYTICAL LETTERS
(2023)
Article
Chemistry, Physical
Karol Wolski, Joanna Smenda, Anna Grobelny, Pawel Dabczynski, Mateusz Marzec, Adrian Cernescu, Magdalena Wytrwal, Andrzej Bernasik, Jakub Rysz, Szczepan Zapotoczny
Summary: Mixed polymer brushes (MPBs) can be synthesized by diluting homopolymer brushes on the surface and grafting other types of chains in the formed voids. The nanophase separation and dynamics of surface-grafted chains can be tailored by modifying their molecular architecture. The mixed polyelectrolyte and conjugated chains synergistically contribute to the properties of the coating.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Anna Bodzon-Kulakowska, Wieslawa Mlodawska, Przemyslaw Mielczarek, Dorota Lachowicz, Piotr Suder, Marek Smoluch
Summary: In this study, we propose a method for lipid analysis based on the MALDI-based mass spectrometry imaging (MSI) approach. We optimized the sample preparation process using a wet-interface matrix deposition system(matrix spraying). Technical considerations, such as the number of matrix layers and the position of the spraying nozzle during matrix deposition, are discussed. Additionally, we investigated the potential improvement in analysis by changing the matrix concentration and solvent composition. This study may benefit researchers working on lipid analysis in unique materials like single oocytes and provide insights for anyone interested in single-cell analysis using MALDI mass spectrometry imaging and the wet-interface matrix deposition method.
Article
Chemistry, Multidisciplinary
Roma Wirecka, Krzysztof Mackosz, Antoni Zywczak, Mateusz Marek Marzec, Szczepan Zapotoczny, Andrzej Bernasik
Summary: In this study, six nanocomposites based on different magnetic nanoparticles and a conducting polymer, poly(3-hexylthiophene-2,5-diyl) (P3HT), were synthesized. The nanoparticles were coated with either squalene and dodecanoic acid or P3HT, and the cores of the nanoparticles were made of nickel ferrite, cobalt ferrite, or magnetite. The average diameters of all synthesized nanoparticles were below 10 nm, with varying magnetic saturation at 300 K. The impact of different magnetic fillers on the conducting properties and the influence of the shell on the final electromagnetic properties of the nanocomposite were explored.
Article
Biochemistry & Molecular Biology
Magdalena Wytrwal, Malgorzata Sekula-Stryjewska, Agata Pomorska, Ewa Oclon, Ewa Zuba-Surma, Szczepan Zapotoczny, Krzysztof Szczubialka
Summary: This study investigated the covalent binding of recombinant human bone morphogenetic protein-2 and -7 in stem cells and its effects on cell adhesion, migration, and osteogenesis. The presence of both proteins enhanced cell adhesion but limited cell motility, while the presence of single proteins promoted cell migration activity. Additionally, the coexistence of the proteins significantly increased early osteogenic marker expression.
Article
Chemistry, Applied
Dorota Lachowicz, Angelika Kmita, Roma Wirecka, Katarzyna Berent, Michal Szuwarzynski, Szczepan Zapotoczny, Anna Pajdak, Grzegorz Cios, Natalia Mazur-Panasiuk, Krzysztof Pyrc, Andrzej Bernasik
Summary: In this study, a new filtering bioaerogel based on linear polyvinyl alcohol (PVA) and the cationic derivative of chitosan (HTCC) was developed for potential antiviral application. The introduction of linear PVA chains formed a strong intermolecular network architecture that efficiently interpenetrated the glutaraldehyde-crosslinked HTCC chains. The modified aerogels showed enhanced micro- and mesopore space as well as BET-specific surface area compared to the starting sample chitosan aerogel crosslinked by glutaraldehyde (Chit/GA). XPS analysis confirmed the presence of cationic groups on the aerogel surface, which can interact with viral capsid proteins. The HTCC/GA/PVA aerogel demonstrated efficient trapping of mouse hepatitis virus (MHV) from suspension without cytotoxic effects on fibroblast cells.
CARBOHYDRATE POLYMERS
(2023)
Article
Chemistry, Applied
Aleksandra Stec, Martyna Chodkowska, Joanna Kasprzyk-Pochopien, Przemyslaw Mielczarek, Wojciech Piekoszewski, Bogdan Lewczuk, Agata Ploska, Leszek Kalinowski, Bartosz Wielgomas, Szymon Dziomba
Summary: A new and scalable method for isolating extracellular vesicles (EV) from Citrus lemon juice samples was developed. The methodology involved preconcentration of the sample using ultrafiltration (UF), followed by purification using size-exclusion chromatography (SEC) and final preconcentration of the eluates. The isolates were found to contain exosome-like vesicles, exocyst-positive organelle (EXPO), and microvesicles through transmission electron microscopy and proteomic analysis. The efficiency of the isolation steps was evaluated using bicinchoninic acid assay (BCA), nanoparticles tracking analysis (NTA), and capillary electrophoresis (CE), showing good correlation between them. CE was proven to be a comprehensive tool for monitoring the EV isolation process, enabling the detection of soluble contaminants, macromolecular aggregates, and vesicle heterogeneity through fluorescent staining of encapsulated nucleic acids.
Article
Chemistry, Applied
Agnieszka Kumorkiewicz-Jamro, Renata Gorska, Malgorzata Krok-Borkowicz, Katarzyna Reczynska-Kolman, Przemyslaw Mielczarek, Lukasz Popenda, Aneta Sporna-Kucab, Anna Tekieli, Elzbieta Pamula, Slawomir Wybraniec
Summary: Atriplex hortensis var. rubra L. extracts from different parts of the plant were analyzed for betalainic profiles and showed strong antioxidant activity. Celosianin and amaranthin were identified as the most potent compounds. The chemical structure of celosianin was elucidated for the first time. Furthermore, the extracts and purified pigments did not induce cytotoxicity and effectively protected cells from oxidative stress-induced cell death and apoptosis.
Editorial Material
Biochemistry & Molecular Biology
Dario Pasini, Szczepan Zapotoczny
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Wojciech Wilkonski, Marcin Krupinski, Lidia Jamroz-Wilkonska, Mariusz Kepczynski, Szczepan Zapotoczny, Urszula Maziarz, Janusz Opila, Piotr Wychowanski, Katarzyna Brus-Sawczuk
Summary: This study compared the effect of three irrigation protocols on the penetration of epoxy sealer into dentinal tubules and two dyes used to stain the sealer. The results showed that the longest resin tags were observed in group 2, while the shortest ones were found in group 1. There were significant differences among the groups in different sections of the roots. The isopropyl alcohol at the end of the irrigating protocol did not affect the higher sealer penetration into the dentinal tubules. The hydrophobic porphyrin may be considered as the favorable dye choice for staining endodontic sealers in further studies.
APPLIED SCIENCES-BASEL
(2023)
Meeting Abstract
Cell & Tissue Engineering
Magdalena Wytrwal-Sarna, Ewa Oclon, Miroslaw Kucharski, Katarzyna Szmajnta, Mariusz Kepczynski, Szczepan Zapotoczny
TISSUE ENGINEERING PART A
(2023)
Article
Chemistry, Applied
Wiktoria Grzebieniarz, Joanna Tkaczewska, Leslaw Juszczak, Pawel Krzysciak, Agnieszka Cholewa-Wojcik, Nikola Nowak, Paulina Guzik, Michel Szuwarzynski, Tomasz Mazur, Ewelina Jamroz
Summary: To improve the quality of multi-layer film, four-layer films were produced based on furcellaran and active ingredients. The films' functional properties were analyzed and their potential as packaging materials for fish products was verified. The films showed improved water properties with increased active ingredient concentration and were effective in inhibiting the growth of microorganisms responsible for spoilage. However, they did not retard lipid oxidation in salmon fillets. Nonetheless, the films have great potential in extending the shelf-life of packed foods.
Article
Chemistry, Applied
Aneta Michna, Agata Pomorska, Wojciech Plazinski, Dawid Lupa, Valery Lutsyk, Joanna Odrobinska-Balis, Szczepan Zapotoczny, Zbigniew Adamczyk
Summary: The physicochemical properties of modified chitosan were studied using molecular dynamics modeling and experimental techniques. It was found that the modified chitosan remained stable at pH up to 10 and could form supported films with kappa-carrageenan.
FOOD HYDROCOLLOIDS
(2024)
